Chemical Fertilizer reduction combined with humic acid fertilizer is an effective pathway to alleviate soil fertility decline and increase fertilizer utilization rate,which is great significant to improve soil quality and ecosystem.In this paper,1/2 total fertilizer（1/2CF）,3/4 total fertilizer（3/4CF） and total fertilizer（CF） were applied with 0mg/kg humic acid（HA₀）,250 mg/kg humic acid(HA₂₅₀),500 mg/kg humic acid(HA₅₀₀) and 0 mg/kg and 100 mg/kg decomposing agent on dry matter quality and nutrient content of maize plant at jointing stage and tasseling stage respectively in order to provide reference for establishing technical model of chemical fertilizer reduction in the black soil region of Songnen Plain.The results showed that dry weight of(CF+V₀HA₂₅₀) and(1/2CF+V₁₀₀HA₀) increased significantly by 13.4%-220.1%and 13.2%-94.4%compared with other treatments at jointing stage.Dry weight of(CF+V₀HA₂₅₀) and(3/4CF+V₁₀₀HA₀) increased significantly by 27.9%-181.0%and 11.5%-82.2%compared with other treatments at tasseling stage.Total nitrogen,total phosphorus and total potassium contents of（CF+V₀HA₀）,(3/4CF+V₀HA₂₅₀) and(CF+V₁₀₀HA₅₀₀) were relatively high at jointing stage,total nitrogen content of(1/2CF+V₀HA₂₅₀)treatment was significantly higher than other treatments,and total phosphorus content of(CF+V₁₀₀HA₅₀₀) treatment was significantly higher than other treatments,and the total potassium content of(3/4CF+V₁₀₀HA₀) treatment was significantly higher than that of other treatments at tasseling stage.By comprehensive analysis,(CF+V₀HA₂₅₀) and(1/2CF+V₁₀₀HA₀) could be considered as suitable complementary measures for the application of chemical fertilizer in the meadow black soil area on Songnen Plain in this study.